Metallized acid polyazo dyes



Patented Oct. 21 1941 Moses L. Crossley, Plainfield, j'anddiincoln M'. Shafer, Upper Montclair, N. J.-, assignorsto American Cyanamid Company, New York, N. Y., a corporation of Maine;

* No Drawing. Application October. 31, 1-939,f

Serial No. 302,132 1 12 Claims. (cream-1'45) This invention relates to metallized polyazo dyes which show excellent fastness to light. and more particularly, polyazo dyes metallized with the metals of the 7th and 8th groups of the periodic table of elements especially manganese, iron, cobalt and nickel. U I

This application is in part a continuation of our co-pending application, Serial No.- 150,540,, filed June 26, 1937, which matured intoU. S-

Patent No. 2,213,647 on September 3, 1940.

v The metallized dyes of thepresent invention are obtained by metallizinga polyazo dye having a middle component which is a dihydroxy aryl compound capable of'combining with twomolecules of diazo compounds in positions ortho-tothe hydroxy groups, at least one of the (ham compounds having a metallizable group. such, as a hydroxyl or carboxyl group ortho to the:

azo group and at least one. endcomponent. containing a solubilizing group. The dyes may berepresented by the following general structural formula:

in which R, R1, R2 and R3 are aryl radicals, the hydroxyl groups on R1 are ortho to the azo groups, X represents groups such as halogen, alkyl, alkoxy, nitro, carboxyl, sulfonic, hydroxyl and hydrogen. At least one of the radicals R and R2 has a metallizable group ortho to the azo group connecting the radical to R1 and at least one of the radicals R and R3 has a solubilizing group.

In carrying out the present invention, the polyazo dyes are metallized' with one or more metalsof the 7th and 8th groups ofthe periodic table of elements such as manganese, iron, co-

halt and nickel or combinations with other metals such as manganese-chromium, cobalbchrommm, nickel-chromium iron-chromium, iron-copper,

etc. These combinations of metals react with the dye to produce a product which is not identical with the mixture of. the products. ob-- tained by treating portions of the dye with separate metals. The metalliccombination or.

complex enters into the dyev molecule-insome manner which is different from the reaction of a single metal. The precise form of. chemical combination has not yet been determined.

The ratio of the metal or metal complex. to

the dye may vary within wide limits andmay depend on the nature of the metal and the number and nature of the metallizable groups in the dye molecule. Where more than one metal is to enter the molecule of the dye, it is, of course, necessary that there be a: plurality 01 pairs of metallizable groups. Such cases correspond to a species under the general formula in which both R and R2 contain hydroxyl or carboxyl groups ortho to the am groups.

The present invention is not limited to a particular process of producing the dyes. Normally they will be prepared by coupling the dihydroxy compound with a, diazo compound and a diazo azo compound. Of course, the polyazo dyes may p be produced by successive couplings of diazo amino compounds which are then rediazotized and further coupled. The end components may be the same-or different.

Metallization is eiiected in the normal manner, for example, by refluxing an aqueous solution of the dye with salts or other suitable compounds of the metals or mixed metals.

In general, the new' dyes are dark colored powders which are quite soluble in water and are capable of producing valuable colors of varied tones when dyed from an. acid. bath. on wool,,'silk, leather and. furs- The. dyes show good to excellentfastness to light, washing, fulling, acid, alkalies, and sea water. The degree. of. fastness will vary with the particular dyes.

and with themetals used. The dyes of the Example 1 1 lIZOEi parts of Jpicramate of 'sodaare suspended. in parts of water and diazoti'zedwith 614' parts hydrochloric acid (real) and 3.66 parts of sodium nitrite keeping the temperature between 25 and 30 C. The excess of acidity is neutralized with a saturated solution of bicarbonate of soda. This diazo solution is then added to a solution containing 5.88 parts of resorcinol in 200 parts of water and 8.5 parts of bicarbonate of soda. The mixture is stirred until coupling is complete and 14.5 parts of soda ash added. Then a diazo solution obtained by treating 14.7 parts of amino azo benzene sulfonic acid in 170 parts of water with 3.66 parts of nitrite and 5.6 parts of acid at 60-63 C. is added and the mixture stirred until coupling is complete.

to Congo.

and a solution containing 12 parts of manganese chloride added.

The dye is salted out with sodium chloride after the solution is made slightly acid The resulting dye paste is dissolved in 800 parts of hot water and-12 partsof sodium v acetate added. The solution-ls heated-t 601C,

The entire mixture is then .1

boiled for two hours and salted out with sodium chloride, filtered and dried at 65-70 C. I The r product is a dark brown powder, soluble in fibers black. Other metals mentioned in the specification may be substituted for cobalt and similar metallized products obtained.

The formula for the dye prior to metallization is as follows:

COOH

Example 3 Dissolve one molecular weight of the dye obtainedby coupling tetrazotized dianisidine with two equivalents of the diazotized product obtained by coupling 4-chlor-2-amino-1-phenol-5- sulfonic acid onto 1,5-dihydroxy naphthalene in tenjimes its weight of water. Add two molecular equivalents of sodium acetate and two molecular equivalents of nickel sulfate. Adjust the pH to 4 and boil for 6 hours. Salt out the metallized dye copper sulfate or chromium sulfate for one molecon in O N N=N- I N O: N=N

Example 2 Y 160 parts of 1 ,5-dihydroxy naphthalene is suspended in 2500 parts of water and 400 parts of soda ash are added. The solution is cooled with ice to 5.l0 C. and then mixed with the diazo product obtained from 189 parts of 2-amino phenol-i-sulfonic acid. The mixture is stirred until coupling is complete. Then the diazo compound obtained from 307 parts of the dye produced by coupling para-aminosalicylic acid with alpha naphthylamine in acid solution is added. Sufiicient sodium'carbonate to have the reaction alkaline throughout'the coupling is added. Then the mixture is stirred until the second coupling is complete. I The reaction must be alkaline throughout the coupling. The mixture is then made acid. to Congo and the dye salted out with sodiurn-chloride. The dye is filtered, and the paste suspended in 6000 parts of water and treated with 240 parts of cobalt chloride, then the mixture is boiledfor several hours. The resulting dye is then .salted out with sodium chloride. "It; is soluble in water and dyes I animal ular equivalent of the nickel sulfate the complex nickel-copper or nickel-chromium metallized dve is produced. V

The formula for the dye prior to metallization is as'ijollovsrs; I

N803 N=N l i v I H OCH:

OCH: OH

SOaNa Example 4 Dissolve 1 molecular weight of the dye obtained by i coupling resorcinol-4-nitro-diazo -o-phenol and then diazo-.phenylrazo-phenyl-methyl-pyrazolonesulfonic acid innten times its weightof water. ."r}dd' 1.2 n 1olecular equivalents of sodium acetate and, an equal molecular equivalent of iron sulfate. 'A'djust the acidity to a pH of 4, boil for 4 hours, saltout the metallized dye withsodium chloride. Filter and dry at 60-70 C. p The Produ t-.1 afld rknow e t o n w te d z pst-eelmel-fihe s e lowi o e of br w The fo dyeprior tometallization is asfollows: J i

Example 6 By substituting 292 parts-of nickel nitrate for the ferric chloride of. Example a brown powder is produced whichdyes animal fibers reddish brown. 7

7 Example 7 By substituting 240 parts of cobalt chloride for the ferric chloride of Example '5 a brown powder is produced which dyes animal fibers yellowish brown.

Example 8 By substituting 290 parts of manganese nitrate for the ferric chloride of Example 5 a brown powder is produced which dyes animal fibers reddish brown.

. Example 9 154 parts of para nitro orthoamino phenolaredissolved. in 200 parts of water and diazotlzed with the addition of 30 parts of 36% hydrochloric acid and69 parts of sodium nitrite at 10 C. and cooled to 5- C.

160 parts of soda ash are added to the dye produced by coupling 2'77 parts or amino azo benzene para sulfonlc acidzto 194 parts of hexyl resorcinoL. The nitro amino phenol diazo is added to this dye "and coupling allowed to stir overnight. I'he dye is precipitated by addition of 15 partsnof sodium chloride per parts of volume and the dyeis filtered.

The dye-is metallized by adding 270 parts per mole offerric chloride to the dye solution and boiling forthree hours. i The dye is precipitated with 20% sodium chloride, made slightly acid to Congo red paper, filtered and dried. The product is a brown powder, soluble in water and dyes animalfibers an olive brown. tone.

'I'he-formulafor thedye prior to metallization is asfoliows:

Example 10 By substituting 292 parts of nickel nitrate crystals for theferricchloride of Example 9 a brown powder is produced which dyes animal fibers brown.

Example 11 By substituting 240 partsof cobalt chloride for the ferric chloride of Example 9 a brown powder is produced which dyes animal fibers brown.

Example 12 The:diazo equivalent to 27.7 parts real amino azo benzene para. sulfon-ic acid, dissolved in .500 cc. of solution; is, coupled to 19.4 parts of hexyl resorcinol at (ii-5 C. in the presence of 20% sodium acetate; solution. 22.1 parts of sodium picramate are dissolved in; 40000. of hot water 3.1. parts-of 36% hydrochloric acid are added and; the slurry: is cooledto. 25 C. At 25-30. C. it isdiaZQtiZed-With 6:9 parts of sodium nitrate dissolved; in; water. After. 45 minutes the diazotization is complete and the slurry is cooled to 5-0 C.

16 parts of soda ash are added to the dye and the diazo picramic acid added and the coupling allowed to stir over night. The next morning the pH is adjusted to 6.. A very faint trace of red shows on methyl red yellow and it is negative to brilliant yellow paper. The dye produced is filtered without the addition of salt and when dry it is a brown color which dyes wool a brown tone.

The dye prior to metallization has the follow- I ing formula:

'292 parts ofnicliel nitrate crystals instead ofj ferric chloride; are dissolved in-water and added to the ye solution of Example '13; arm: mixture is boiled for 3 hours and'salte'd'outwithzoi art of sodium o e' e' 0 as h 5'-. .-1i tion. .It is made slightly acid. to Congo red paper and filtered. The dye," when dried, abrown powder, soluble in .w

aterand dyes wool a red sh browntone.

240 parts or coon; chlorideinsteador; the ferric chloride, are dissolved in water and added'to the,

dye solution of Example 13 with the pH adjusted to approximately 4; boiled for 3 hours and the dye precipitated by the use of parts of salt per 100 parts of dye solution. It is made Slightly acid to Congo red, filtered and dried. The product is a brown powder soluble in water and dyes wool a yellowish brown tone.

Example 16 400 parts of water and stirred to complete solution, then 12.6.partsof hydrochloric acid, 100% The solution f is are added. I The mixture cooled reap C.:-'and diazotized with the addition of 6.9 parts ofsodium nitrite dissolved in water. 34.2 parts of chromotropic acid are dissolved in'iOO parts of water with the addition of 9.4 partsof .sodiuinbicarbonatel. This solution isadded to the-pi'cramic acid cliazo and; allowed to '-cool over night; The diazo from .27.? parts of amino-azo-benzene is addedtoithismonazo dye; 8 parts' of magnesium oxide are added :and the .'coupling is stirred for 4 or 5 hours." 600ipartsfof s'altare add'ed ah'd hydrocmorie acidis added until th'ere'is afaint; but permanent ltest on Congo red p aper. -The dye is filterediafter it ha'sibeen stirred for'severalf 5 invention.

hours to complete precipitation. The product when filtered and dried is a dark blue powder which dyes animal fibers a reddish blue tone.

270 parts of ferric chloride are added and boiled for 3 hours. The dye is precipitated by adding sodium chloride and making slightly acid to Congo red paper. The product is a dark brown powder, soluble in water and dyes wool a reddish gray tone.

The formula for the dye prior to metallization is as follows:

OH OH HOaS SOaH Example 18 292 parts of nickel nitrate crystals are dissolved in water instead of the ferric chloride of Example 17 and added to the dye solution. The mixture is boiled for three hours and salted out with 20% of sodium chloride. It is made slightly acid to Congo red paper and filtered. The dye, when dried, is a dark brown powder, soluble in water and dyes wool a violetgray tone.

Example 19 -240fpartsof cobalt chloride are dissolved in. watteriinstead 'o'f thefferric .'chloride .of Example 17 and'addedtoj 'the dye solution with the DH,

adjusted to approximately f4; itis boiled for three hours andjthefclye precipitated by. the use of 20 parts for; salt perl parts of dye solution; It is made'sligh'tly acid to Congo red and filtered and dried. 1 The' product is a. dark brown powdersoluble. iniwater and dyes woola violet gray. tone.

Example 20 290 parts of manganese nitrate were dissolved in water instead of the ferric chloride of Example 17 and added to the dye solution which had had its pH adjusted to approximately 4. The solution was boiled for three hours. After salting out and drying, a dark brown powder was produced. This-was soluble in water and dyed wool a violet gray tone.

The following table illustrates further dyes which can be produced according to the present Table of rypes of dye I Color'p'roduoed'liy inetallizedproduct .First component Middle-comp e t second component I fl Mn Fe Co Ni ion!) 5 Bluish..Brown Bluish B1 1 h v p I V, V I HnN f LY black.- black. biscl r. NH, l on.

U *7 N=N OH swin er 1 0 OH T f .-'.d' l

NH, 0 Black.-. Black. oiN NH; we

No, x

H N=N mea 1.

saw-73 1 Table of :fiypes ,0 dyes-Continued I Color produced by metallized product First component Middle component Second component. I l

Mn Fe Co Ni OH OH Brown" Yellow Brown.-. Br0w11. NH: brown. 0,N NH, 0cm 0H I .N;-N v v Qs 01H SOaH .OH NH; Green..- Brown Green Green. HO

NNCC-CH:

HO-C N H 80:11 N .l I

SOzH

N==NC--C-CH; OH HaN Yellow Olive Yellow Yellow;

H I brown. brown. brown. brown. HO-C N v OH N Hols N=N(fi(|.|7-CH| OH HO NH; Blue...- Brown. Blue Blue.

H0C N :7 I

SOaH

OH NH: 011 j NH, Brown.. .do Brown. Brown. N N O OH H03 3;- OH NO NO:

N=N NH aHs OH OH NH? Blue.---- do- Blue Blue.

HOsS

CH; H t

En-5on1 0H NH: Browm- Dark Bluered Blu'ared.

brown.

on 011 on I my 131119---- Brown Blue. j Blu e.

N=N f 0H isom- NO:

Firstpompo nent Middle cdmpo nen't Second vcomponent' Mn Fe Co Ni OH OH NH: Redblue Brown Redblue Redblue.

m Sm H: H N=N' -S0JH OH OH NH: .do.. do.. Brown.- Brown.

OzN NH: OH

NH: NH: Green-.. Olive.-- Green.-- Green."

SOaH f N=N f N='N-;c:-r J- i2n no-c N NH: NH: 181119.... Brown; Blue...- Blue.

ofi OH f om H N N I firowno Dark Brown. Brown;

. brown. 1 i

0311 N f lOH QNH; iied -do Red Red 1 blue. blue. blue. 0H CH v I -T 0,11 H N=N Color produced by metallized product ag-259,734 '7 Table of t peg oj dyes-Continued j: 7 I v i "Color produced by metallized product First'component-' f Middle component Second component 'Mn' life Co Ni SO|H Red 7 Dark crown; Brown] blue. brown.

HO e v "1 CH DE CHI NH: 1 j V I /NH1. .7 0H NH: ?Red =Brown.- Red' lied.

011 cm a E TOHa' M 7 I V 30,37 7 .s v 7 on i 011 NH: Blue--. 1o TB1ue Lees. f OIN NH1 S A I OH *GH H0 8 s0=n NE; NH: I Red. --.do... Red-.." Red.

OaH

- I 7 Blue; D 'a r k-' Blue .l Blue.

SOEH brown. V v

; sour groups of the periodic table of the elements.

What we claim is: 6 1. Metallized azo dyes having the following formula:

in which R, R1, R2 and R3 are aryl radicals, the

hydroxyl groups on R1 are ortho to the azo groups and X represents a member of the group consisting of halogen, alkyl, alkoxy, nitro, oarboxyl, sulfonic, hydroxyl and hydrogen, at least 7 one 50f the radicalsRand R2 has a metalliz able group ortho to the azo group connecting the radical to R1 and at least one of the radicals R and R: has a solubilizing group, the dye being metallized with at least pneoi the metals included in the seventh and'eighth groups of the periodic table of elements.

2. Metallizedazo dyes, the azo'dye component of which has the following formula:

in which R1 is a radical of the benzene series having the hydroxyl groups ortho to the azo groups and R, R2 and R3 are aryl radicals, at least one of the radicals R and R2 has a metallizable group ortho to the azo group connecting the radical with R1 and at least one of the radicals R and R3 has a solubilizing group, and the dye being metallized with at least one of the metals included in the seventh and eighth groups of the periodic table of elements.

3. Metall' of which has the following formula:

R/N=N"-R1 (OH) 2N=N-R2N=NR3 in which the radicals R, Re and R3 are aryl radi:

cals, R1 'is a radical'of ,the naphthalene series having the hyclroxyl groups ortho to the two'a zo groups, at least one of the radicals R andvRz having a metallizable group ortho to the am acid az obenzene, the dye being metallized with ad azo dyes, the azo dye component V group connecting the radical R1, and at least one of the radicals R and R3 containing a solubilizing group, the dye being metallized with at least one of the metals included in the seventh and eighth groups of the periodic table of elements.

4. A metallized azo dye according to claim 1 in which both R and R2 contain metallizable groups ortho to th azo groups connecting these radicals with R1.

5. A metallized azo dye according to claim 1 in which R3 is an aryl-azo-aryl radical.

at least one metal included in the seventh and eighth groups of the periodic table of elements. 10. A complex iron compound of the trisazo 6. A metallized azo dye according to claim 1 I in which R3 is an aryl radical free from azo groups except the one connecting to R2.

7. A metallized azo dye according to claim 2 in which R is phenol with the hydroxyl group ortho tothe azo group and R2 is an azobenzene radical.

NaOzS 8. A metallized azo dye according to claim 2 inwhichRis No i I T,

7 N02 9. Ametallized trisazo dye of the general formula:' a

V f: in which R2 represents a radical of a 4"-sulfonic 1 1. A complex nickel compound of the tetrakisazo dyestuii of the formula:

7 12. A metallized azo dye according to claim 1 "in which both R and R2 contain metallizable groups ortho to the azo groups connecting-these radicals to 1 and the dye metalized with a; mixture of at least one of the metals included in'the seventh and eighth groups of the periodic table 01' elements with at least one or the metals included in the group consisting of chromium and copper. a a

MOSES L. CROSSLEY. LINCOLN M. SHAFER. 

